Published in Notes from the Leyden Museum, in 1906, in volume 26, pages 207-222

Published in Notes From The Leyden Museum, in 1906, in volume 26, pages 223-225

Published in Notes Leyden Museum, in 1906, in volume 26, pages 235-238

Published in Notes From The Leyden Museum, in 1906, in volume 26, issue 4, pages 200

Published in Notes From The Leyden Museum, in 1906, in volume 26, issue 4, pages 226-228

Published in Notes From The Leyden Museum, in 1906, in volume 26, issue 4, pages 229-234

Published in Notes Leyden Museum, in 1906, in volume 28, pages 1-116

Published in Notes From The Leyden Museum, in 1906, in volume 28, pages 120-128

Published in Notes From The Leyden Museum, in 1906, in volume 28, pages 129-130

Published in Notes From The Leyden Museum, in 1906, in volume 28, pages 131-133

Published in Notes Leyden Museum, in 1906, in volume 28, pages 134-136

Published in Notes From The Leyden Museum, in 1906, in volume 28, pages 137-138

Published in Notes from the Leyden Museum, in 1906, in volume 28, pages 141-145

Published in Notes From The Leyden Museum, in 1906, in volume 28, issue 1/2, pages 117-119

Published in Notes From The Leyden Museum, in 1906, in volume 28, issue 1/2, pages 139-140